Argutostrea gen. nov.: Questions of taxonomy and ethology of Middle–Late Jurassic epibiont oysters (Bivalvia, Ostreoidea)

Autor:	V. B. Seltser, I. N. Kosenko
Rok vydání:	2016
Předmět:	Systematics 010506 paleontology Oyster biology Umbo Paleontology 010502 geochemistry & geophysics biology.organism_classification Bivalvia 01 natural sciences biology.animal Ostreoidea Taxonomy (biology) Epibiont Gryphaeidae 0105 earth and related environmental sciences
Zdroj:	Paleontological Journal. 50:578-584
ISSN:	1555-6174 0031-0301
DOI:	10.1134/s0031030116060083
Popis:	Morphology and ethology of the Middle–Late Jurassic oyster “Liostrea” roemeri (Quenstedt) from the Upper Callovian of the Volga Region near Saratov and Middle Volgian of the Subpolar Urals are considered. The inverted shell shape and presence of a beaked umbo on the right valves allow the assignment of these oysters to a new monotypic genus, Argutostrea Kosenko, gen. nov. Features of the internal valve structure examined in only one specimen suggest that the new genus should tentatively be included in the subfamily Pycnodonteinae Stenzel, 1959 of the family Gryphaeidae Vialov, 1936. It is shown that shell morphology of the oyster A. roemeri is connected with transition to dwelling on floating ammonites.
Databáze:	OpenAIRE
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